$256 Cheap Flights from Moline (MLI) to Seattle (SEA)

Moline (MLI) to Seattle (SEA) at a glance

Explore a range of flights from Moline (MLI) to Seattle (SEA) on this domestic short-haul route. Take the time to compare options, from full-service airlines to budget-friendly choices, to find the itinerary that aligns with your travel budget and schedule. As you plan your trip to experience Seattle's iconic attractions and vibrant neighborhoods, check out key details for flights from Quad City International Airport (MLI) to Seattle-Tacoma International Airport (SEA).

• Fastest flight duration: around 6 hours in-flight, plus roughly 1h 30m layover with one stop
• Route distance: roughly 1,600 miles (2,570 km)
• Flights per week: around 9 departures on average
• Typical fares (one-way): economy tickets often range from $135–$485, depending on seasonality and how far ahead you book

Flights from Quad City International Airport (MLI) to Seattle - Tacoma International Airport (SEA)

According to recent traveler bookings, the top airlines flying from Moline to Seattle often provide one-stop services with popular layover options at O'Hare International Airport (ORD), which has an approximate layover of 1 hour and 30 minutes; Dallas-Fort Worth International Airport (DFW), also around 1 hour and 30 minutes; and Denver International Airport (DEN), with a layover of about 1 hour and 15 minutes. This allows you to choose the ideal combination of price, total travel time, and cabin class for your journey.

• United: This major airline provides comprehensive service with one-stop options. One-way fares generally fall between $135 and $545, and they account for about 47% of departures on this route. Expect an in-flight duration of approximately 6 hours and a total travel time of around 7h 45m, including layover time.
• American Airlines: Another key player in full-service travel, American Airlines also offers one-stop services, with typical one-way fares ranging from $135 to $515. They handle roughly 44% of the departures for this route, featuring an in-flight time of 6 hours and a total journey duration of about 7h 45m, considering layovers.
• Alaska Airlines: This full-service carrier provides one-stop options, with one-way ticket prices generally between $225 and $425. Alaska Airlines represents around 7% of the flights on this route. The in-flight duration is about 6 hours, with the overall travel time being roughly 7h 45m, including any layovers.
• Delta: Delta also serves as a full-service airline offering one-stop flights. Their one-way fares typically range from $180 to $695, covering approximately 2% of departures on this route. Passengers can anticipate an in-flight time of around 6 hours, with an overall journey time of about 7h 45m, factoring in layovers.

Travelers flying from Moline to Seattle can enhance their journey by upgrading to first class, available through both United and American Airlines for this route.

Best time to fly from Moline (MLI) to Seattle (SEA)

The most popular months for travelers flying from Moline to Seattle are March, August, and October, when peak temperatures in Seattle reach up to 67.5°F in August. If you prefer quieter travel, consider February, the least busy time to visit with temperatures around 40.5°F and typically the lowest average one-way fare (around $247). Flight availability peaks in June, with approximately 13 flights per week, making it easier to find convenient departure times. January, March, April, July, and November have the fewest flights, with approximately 8 flights per week.

• Cheapest time to fly: February usually offers good deals with average one-way fare around $247, roughly 15% cheaper than the yearly average.
• More budget-friendly months to fly: April, October, and January typically offer average one-way fares of around $257.
• Most flight options: June has the highest number of flights from Moline to Seattle, with approximately 13 flights per week, giving you more flexibility in scheduling your trip.

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Moline (MLI) to Seattle (SEA)

• Moline to Seattle (MLI-BFI): Boeing Field Airport (BFI) is located approximately 6 miles from Seattle-Tacoma International Airport (SEA).
• Davenport to Seattle (DVN-SEA): Davenport Municipal Airport (DVN) lies about 12 miles from Quad City International Airport (MLI).
• Galesburg to Seattle (GBG-SEA): Galesburg Municipal Airport (GBG) is roughly 35 miles distant from Quad City International Airport (MLI).

How to find the best prices for flights from Moline (MLI) to Seattle (SEA)

Getting some of the best deals on flights from Moline to Seattle is all about timing and flexibility. Here are some key tips to help you save:

1. Best times to book and fly: cheaper fares are usually available when booking 2-8 weeks in advance, which coincides with when most travelers make their reservations. Afternoon departures (12pm-6pm) often offer lower prices, although Morning flights (5am-12pm) are the most popular. Additionally, flying on Wednesday typically results in cheaper prices, while Thursday is the busiest travel day.
2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Seattle - Tacoma International Airport from Quad City International Airport

Seattle welcomes travelers from Moline with a range of transport options based on price, convenience, and proximity. Seattle city center is approximately a 20-minute drive (covering about 14 miles) from Seattle - Tacoma International Airport, depending on traffic. Here's how to reach Seattle efficiently:

• Hotel transfer: Transfers offer a convenient way to reach your hotel in Seattle, with private rides that can be arranged in advance.
• Car rental: Renting a car from Seattle - Tacoma International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Seattle - Tacoma International Airport on Expedia.
• Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
• Public transportation: From Seattle - Tacoma International Airport, SeaTac/Airport Station, a metro station, is located about 0.3 miles from the airport and easily accessible on foot, while Tukwila Station, a train station, is situated about 4.3 miles away and is best reached by car.

Moline to Seattle Flights

The cheapest times to fly from Moline to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Moline to Seattle are during the month of January. You can find some of the cheapest flights from Moline to Seattle with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Moline to Seattle

Sunday is one of the best days to book for cheap flights from Moline to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Moline to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Moline to Seattle in 2026. You can also book with separate airlines for your outbound and return journeys, from $256 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Moline to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Moline to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.